brh_machdep.c revision 1.44.14.1
1 /* $NetBSD: brh_machdep.c,v 1.44.14.1 2018/09/06 06:55:29 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1997,1998 Mark Brinicombe. 40 * Copyright (c) 1997,1998 Causality Limited. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Mark Brinicombe 54 * for the NetBSD Project. 55 * 4. The name of the company nor the name of the author may be used to 56 * endorse or promote products derived from this software without specific 57 * prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * Machine dependent functions for kernel setup for the ADI Engineering 72 * BRH i80200 evaluation platform. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: brh_machdep.c,v 1.44.14.1 2018/09/06 06:55:29 pgoyette Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_ddb.h" 80 #include "opt_pmap_debug.h" 81 82 #include <sys/param.h> 83 #include <sys/device.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/exec.h> 87 #include <sys/proc.h> 88 #include <sys/msgbuf.h> 89 #include <sys/reboot.h> 90 #include <sys/termios.h> 91 #include <sys/ksyms.h> 92 #include <sys/bus.h> 93 #include <sys/cpu.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #include <machine/db_machdep.h> 100 #include <ddb/db_sym.h> 101 #include <ddb/db_extern.h> 102 103 #include <machine/bootconfig.h> 104 #include <arm/locore.h> 105 #include <arm/undefined.h> 106 107 #include <arm/arm32/machdep.h> 108 109 #include <arm/xscale/i80200reg.h> 110 #include <arm/xscale/i80200var.h> 111 112 #include <dev/pci/ppbreg.h> 113 114 #include <arm/xscale/beccreg.h> 115 #include <arm/xscale/beccvar.h> 116 117 #include <evbarm/adi_brh/brhreg.h> 118 #include <evbarm/adi_brh/brhvar.h> 119 #include <evbarm/adi_brh/obiovar.h> 120 121 #include "ksyms.h" 122 123 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 124 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 125 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 126 127 /* 128 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 129 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 130 */ 131 #define KERNEL_VM_SIZE 0x0C000000 132 133 BootConfig bootconfig; /* Boot config storage */ 134 char *boot_args = NULL; 135 char *boot_file = NULL; 136 137 vaddr_t physical_start; 138 vaddr_t physical_freestart; 139 vaddr_t physical_freeend; 140 vaddr_t physical_end; 141 u_int free_pages; 142 143 /*int debug_flags;*/ 144 #ifndef PMAP_STATIC_L1S 145 int max_processes = 64; /* Default number */ 146 #endif /* !PMAP_STATIC_L1S */ 147 148 /* Physical and virtual addresses for some global pages */ 149 pv_addr_t minidataclean; 150 151 paddr_t msgbufphys; 152 153 #ifdef PMAP_DEBUG 154 extern int pmap_debug_level; 155 #endif 156 157 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 158 159 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 160 #define KERNEL_PT_KERNEL_NUM 2 161 162 /* L2 tables for mapping kernel VM */ 163 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 164 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 165 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 166 167 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 168 169 /* Prototypes */ 170 171 void consinit(void); 172 173 #include "com.h" 174 #if NCOM > 0 175 #include <dev/ic/comreg.h> 176 #include <dev/ic/comvar.h> 177 #endif 178 179 /* 180 * Define the default console speed for the board. This is generally 181 * what the firmware provided with the board defaults to. 182 */ 183 #ifndef CONSPEED 184 #define CONSPEED B57600 185 #endif /* ! CONSPEED */ 186 187 #ifndef CONUNIT 188 #define CONUNIT 0 189 #endif 190 191 #ifndef CONMODE 192 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 193 #endif 194 195 int comcnspeed = CONSPEED; 196 int comcnmode = CONMODE; 197 int comcnunit = CONUNIT; 198 199 /* 200 * void cpu_reboot(int howto, char *bootstr) 201 * 202 * Reboots the system 203 * 204 * Deal with any syncing, unmounting, dumping and shutdown hooks, 205 * then reset the CPU. 206 */ 207 void 208 cpu_reboot(int howto, char *bootstr) 209 { 210 211 /* 212 * If we are still cold then hit the air brakes 213 * and crash to earth fast 214 */ 215 if (cold) { 216 doshutdownhooks(); 217 pmf_system_shutdown(boothowto); 218 printf("The operating system has halted.\n"); 219 printf("Please press any key to reboot.\n\n"); 220 cngetc(); 221 printf("rebooting...\n"); 222 goto reset; 223 } 224 225 /* Disable console buffering */ 226 227 /* 228 * If RB_NOSYNC was not specified sync the discs. 229 * Note: Unless cold is set to 1 here, syslogd will die during the 230 * unmount. It looks like syslogd is getting woken up only to find 231 * that it cannot page part of the binary in as the filesystem has 232 * been unmounted. 233 */ 234 if (!(howto & RB_NOSYNC)) 235 bootsync(); 236 237 /* Say NO to interrupts */ 238 splhigh(); 239 240 /* Do a dump if requested. */ 241 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 242 dumpsys(); 243 244 /* Run any shutdown hooks */ 245 doshutdownhooks(); 246 247 pmf_system_shutdown(boothowto); 248 249 /* Make sure IRQ's are disabled */ 250 IRQdisable; 251 252 if (howto & RB_HALT) { 253 brh_7seg('8'); 254 printf("The operating system has halted.\n"); 255 printf("Please press any key to reboot.\n\n"); 256 cngetc(); 257 } 258 259 printf("rebooting...\n\r"); 260 reset: 261 cpu_reset(); 262 } 263 264 /* Static device mappings. */ 265 static const struct pmap_devmap brh_devmap[] = { 266 { 267 BRH_PCI_CONF_VBASE, 268 BECC_PCI_CONF_BASE, 269 BRH_PCI_CONF_VSIZE, 270 VM_PROT_READ|VM_PROT_WRITE, 271 PTE_NOCACHE, 272 }, 273 { 274 BRH_PCI_MEM1_VBASE, 275 BECC_PCI_MEM1_BASE, 276 BRH_PCI_MEM1_VSIZE, 277 VM_PROT_READ|VM_PROT_WRITE, 278 PTE_NOCACHE, 279 }, 280 { 281 BRH_PCI_MEM2_VBASE, 282 BECC_PCI_MEM2_BASE, 283 BRH_PCI_MEM2_VSIZE, 284 VM_PROT_READ|VM_PROT_WRITE, 285 PTE_NOCACHE, 286 }, 287 { 288 BRH_UART1_VBASE, 289 BRH_UART1_BASE, 290 BRH_UART1_VSIZE, 291 VM_PROT_READ|VM_PROT_WRITE, 292 PTE_NOCACHE, 293 }, 294 { 295 BRH_UART2_VBASE, 296 BRH_UART2_BASE, 297 BRH_UART2_VSIZE, 298 VM_PROT_READ|VM_PROT_WRITE, 299 PTE_NOCACHE, 300 }, 301 { 302 BRH_LED_VBASE, 303 BRH_LED_BASE, 304 BRH_LED_VSIZE, 305 VM_PROT_READ|VM_PROT_WRITE, 306 PTE_NOCACHE, 307 }, 308 { 309 BRH_PCI_IO_VBASE, 310 BECC_PCI_IO_BASE, 311 BRH_PCI_IO_VSIZE, 312 VM_PROT_READ|VM_PROT_WRITE, 313 PTE_NOCACHE, 314 }, 315 { 316 BRH_BECC_VBASE, 317 BECC_REG_BASE, 318 BRH_BECC_VSIZE, 319 VM_PROT_READ|VM_PROT_WRITE, 320 PTE_NOCACHE, 321 }, 322 { 323 0, 324 0, 325 0, 326 0, 327 0, 328 } 329 }; 330 331 static void 332 brh_hardclock_hook(void) 333 { 334 static int snakefreq; 335 336 if ((snakefreq++ & 15) == 0) 337 brh_7seg_snake(); 338 } 339 340 /* 341 * u_int initarm(...) 342 * 343 * Initial entry point on startup. This gets called before main() is 344 * entered. 345 * It should be responsible for setting up everything that must be 346 * in place when main is called. 347 * This includes 348 * Taking a copy of the boot configuration structure. 349 * Initialising the physical console so characters can be printed. 350 * Setting up page tables for the kernel 351 * Relocating the kernel to the bottom of physical memory 352 */ 353 u_int 354 initarm(void *arg) 355 { 356 extern vaddr_t xscale_cache_clean_addr; 357 #ifdef DIAGNOSTIC 358 extern vsize_t xscale_minidata_clean_size; 359 #endif 360 int loop; 361 int loop1; 362 u_int l1pagetable; 363 paddr_t memstart; 364 psize_t memsize; 365 366 /* 367 * Clear out the 7-segment display. Whee, the first visual 368 * indication that we're running kernel code. 369 */ 370 brh_7seg(' '); 371 372 /* 373 * Since we have mapped the on-board devices at their permanent 374 * locations already, it is possible for us to initialize 375 * the console now. 376 */ 377 consinit(); 378 379 #ifdef VERBOSE_INIT_ARM 380 /* Talk to the user */ 381 printf("\nNetBSD/evbarm (ADI BRH) booting ...\n"); 382 #endif 383 384 /* Calibrate the delay loop. */ 385 becc_hardclock_hook = brh_hardclock_hook; 386 387 /* 388 * Heads up ... Setup the CPU / MMU / TLB functions 389 */ 390 if (set_cpufuncs()) 391 panic("CPU not recognized!"); 392 393 /* 394 * We are currently running with the MMU enabled and the 395 * entire address space mapped VA==PA. Memory conveniently 396 * starts at 0xc0000000, which is where we want it. Certain 397 * on-board devices have already been mapped where we want 398 * them to be. There is an L1 page table at 0xc0004000. 399 */ 400 401 becc_icu_init(); 402 403 /* 404 * Memory always starts at 0xc0000000 on a BRH, and the 405 * memory size is always 128M. 406 */ 407 memstart = 0xc0000000UL; 408 memsize = (128UL * 1024 * 1024); 409 410 #ifdef VERBOSE_INIT_ARM 411 printf("initarm: Configuring system ...\n"); 412 #endif 413 414 /* Fake bootconfig structure for the benefit of pmap.c */ 415 /* XXX must make the memory description h/w independent */ 416 bootconfig.dramblocks = 1; 417 bootconfig.dram[0].address = memstart; 418 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 419 420 /* 421 * Set up the variables that define the availablilty of 422 * physical memory. For now, we're going to set 423 * physical_freestart to 0xc0200000 (where the kernel 424 * was loaded), and allocate the memory we need downwards. 425 * If we get too close to the L1 table that we set up, we 426 * will panic. We will update physical_freestart and 427 * physical_freeend later to reflect what pmap_bootstrap() 428 * wants to see. 429 * 430 * XXX pmap_bootstrap() needs an enema. 431 */ 432 physical_start = bootconfig.dram[0].address; 433 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 434 435 physical_freestart = 0xc0009000UL; 436 physical_freeend = 0xc0200000UL; 437 438 #ifdef VERBOSE_INIT_ARM 439 /* Tell the user about the memory */ 440 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 441 physical_start, physical_end - 1); 442 #endif 443 444 /* 445 * Okay, the kernel starts 2MB in from the bottom of physical 446 * memory. We are going to allocate our bootstrap pages downwards 447 * from there. 448 * 449 * We need to allocate some fixed page tables to get the kernel 450 * going. We allocate one page directory and a number of page 451 * tables and store the physical addresses in the kernel_pt_table 452 * array. 453 * 454 * The kernel page directory must be on a 16K boundary. The page 455 * tables must be on 4K boundaries. What we do is allocate the 456 * page directory on the first 16K boundary that we encounter, and 457 * the page tables on 4K boundaries otherwise. Since we allocate 458 * at least 3 L2 page tables, we are guaranteed to encounter at 459 * least one 16K aligned region. 460 */ 461 462 #ifdef VERBOSE_INIT_ARM 463 printf("Allocating page tables\n"); 464 #endif 465 466 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 467 468 #ifdef VERBOSE_INIT_ARM 469 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 470 physical_freestart, free_pages, free_pages); 471 #endif 472 473 /* Define a macro to simplify memory allocation */ 474 #define valloc_pages(var, np) \ 475 alloc_pages((var).pv_pa, (np)); \ 476 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 477 478 #define alloc_pages(var, np) \ 479 physical_freeend -= ((np) * PAGE_SIZE); \ 480 if (physical_freeend < physical_freestart) \ 481 panic("initarm: out of memory"); \ 482 (var) = physical_freeend; \ 483 free_pages -= (np); \ 484 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 485 486 loop1 = 0; 487 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 488 /* Are we 16KB aligned for an L1 ? */ 489 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 490 && kernel_l1pt.pv_pa == 0) { 491 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 492 } else { 493 valloc_pages(kernel_pt_table[loop1], 494 L2_TABLE_SIZE / PAGE_SIZE); 495 ++loop1; 496 } 497 } 498 499 /* This should never be able to happen but better confirm that. */ 500 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 501 panic("initarm: Failed to align the kernel page directory\n"); 502 503 /* 504 * Allocate a page for the system page mapped to V0x00000000 505 * This page will just contain the system vectors and can be 506 * shared by all processes. 507 */ 508 alloc_pages(systempage.pv_pa, 1); 509 510 /* Allocate stacks for all modes */ 511 valloc_pages(irqstack, IRQ_STACK_SIZE); 512 valloc_pages(abtstack, ABT_STACK_SIZE); 513 valloc_pages(undstack, UND_STACK_SIZE); 514 valloc_pages(kernelstack, UPAGES); 515 516 /* Allocate enough pages for cleaning the Mini-Data cache. */ 517 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 518 valloc_pages(minidataclean, 1); 519 520 #ifdef VERBOSE_INIT_ARM 521 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 522 irqstack.pv_va); 523 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 524 abtstack.pv_va); 525 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 526 undstack.pv_va); 527 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 528 kernelstack.pv_va); 529 #endif 530 531 /* 532 * XXX Defer this to later so that we can reclaim the memory 533 * XXX used by the RedBoot page tables. 534 */ 535 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 536 537 /* 538 * Ok we have allocated physical pages for the primary kernel 539 * page tables 540 */ 541 542 #ifdef VERBOSE_INIT_ARM 543 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 544 #endif 545 546 /* 547 * Now we start construction of the L1 page table 548 * We start by mapping the L2 page tables into the L1. 549 * This means that we can replace L1 mappings later on if necessary 550 */ 551 l1pagetable = kernel_l1pt.pv_pa; 552 553 /* Map the L2 pages tables in the L1 page table */ 554 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 555 &kernel_pt_table[KERNEL_PT_SYS]); 556 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 557 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 558 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 559 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 560 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 561 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 562 563 /* update the top of the kernel VM */ 564 pmap_curmaxkvaddr = 565 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("Mapping kernel\n"); 569 #endif 570 571 /* Now we fill in the L2 pagetable for the kernel static code/data */ 572 { 573 extern char etext[], _end[]; 574 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 575 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 576 u_int logical; 577 578 textsize = (textsize + PGOFSET) & ~PGOFSET; 579 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 580 581 logical = 0x00200000; /* offset of kernel in RAM */ 582 583 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 584 physical_start + logical, textsize, 585 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 587 physical_start + logical, totalsize - textsize, 588 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 } 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Constructing L2 page tables\n"); 593 #endif 594 595 /* Map the stack pages */ 596 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 597 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 599 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 601 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 602 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 603 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 605 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 606 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 607 608 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 609 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 610 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 611 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 612 } 613 614 /* Map the Mini-Data cache clean area. */ 615 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 616 minidataclean.pv_pa); 617 618 /* Map the vector page. */ 619 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 620 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 621 622 /* Map the statically mapped devices. */ 623 pmap_devmap_bootstrap(l1pagetable, brh_devmap); 624 625 /* 626 * Give the XScale global cache clean code an appropriately 627 * sized chunk of unmapped VA space starting at 0xff500000 628 * (our device mappings end before this address). 629 */ 630 xscale_cache_clean_addr = 0xff500000U; 631 632 /* 633 * Now we have the real page tables in place so we can switch to them. 634 * Once this is done we will be running with the REAL kernel page 635 * tables. 636 */ 637 638 /* Switch tables */ 639 #ifdef VERBOSE_INIT_ARM 640 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 641 #endif 642 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 643 cpu_setttb(kernel_l1pt.pv_pa, true); 644 cpu_tlb_flushID(); 645 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 646 647 /* 648 * Move from cpu_startup() as data_abort_handler() references 649 * this during uvm init 650 */ 651 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 652 653 #ifdef VERBOSE_INIT_ARM 654 printf("done!\n"); 655 #endif 656 657 #ifdef VERBOSE_INIT_ARM 658 printf("bootstrap done.\n"); 659 #endif 660 661 /* 662 * Inform the BECC code where the BECC is mapped. 663 */ 664 becc_vaddr = BRH_BECC_VBASE; 665 666 /* 667 * Now that we have becc_vaddr set, calibrate delay. 668 */ 669 becc_calibrate_delay(); 670 671 /* 672 * BECC <= Rev7 can only address 64M through the inbound 673 * PCI windows. Limit memory to 64M on those revs. (This 674 * problem was fixed in Rev8 of the BECC; get an FPGA upgrade.) 675 */ 676 { 677 vaddr_t va = BRH_PCI_CONF_VBASE | (1U << BECC_IDSEL_BIT) | 678 PCI_CLASS_REG; 679 uint32_t reg; 680 681 reg = *(volatile uint32_t *) va; 682 becc_rev = PCI_REVISION(reg); 683 if (becc_rev <= BECC_REV_V7 && 684 memsize > (64UL * 1024 * 1024)) { 685 memsize = (64UL * 1024 * 1024); 686 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 687 physical_end = physical_start + 688 (bootconfig.dram[0].pages * PAGE_SIZE); 689 printf("BECC <= Rev7: memory truncated to 64M\n"); 690 } 691 } 692 693 /* 694 * Update the physical_freestart/physical_freeend/free_pages 695 * variables. 696 */ 697 { 698 extern char _end[]; 699 700 physical_freestart = physical_start + 701 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 702 KERNEL_BASE); 703 physical_freeend = physical_end; 704 free_pages = 705 (physical_freeend - physical_freestart) / PAGE_SIZE; 706 } 707 #ifdef VERBOSE_INIT_ARM 708 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 709 physical_freestart, free_pages, free_pages); 710 #endif 711 712 physmem = (physical_end - physical_start) / PAGE_SIZE; 713 714 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 715 716 /* 717 * Pages were allocated during the secondary bootstrap for the 718 * stacks for different CPU modes. 719 * We must now set the r13 registers in the different CPU modes to 720 * point to these stacks. 721 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 722 * of the stack memory. 723 */ 724 #ifdef VERBOSE_INIT_ARM 725 printf("init subsystems: stacks "); 726 #endif 727 728 set_stackptr(PSR_IRQ32_MODE, 729 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 730 set_stackptr(PSR_ABT32_MODE, 731 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 732 set_stackptr(PSR_UND32_MODE, 733 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 734 735 /* 736 * Well we should set a data abort handler. 737 * Once things get going this will change as we will need a proper 738 * handler. 739 * Until then we will use a handler that just panics but tells us 740 * why. 741 * Initialisation of the vectors will just panic on a data abort. 742 * This just fills in a slightly better one. 743 */ 744 #ifdef VERBOSE_INIT_ARM 745 printf("vectors "); 746 #endif 747 data_abort_handler_address = (u_int)data_abort_handler; 748 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 749 undefined_handler_address = (u_int)undefinedinstruction_bounce; 750 751 /* Initialise the undefined instruction handlers */ 752 #ifdef VERBOSE_INIT_ARM 753 printf("undefined "); 754 #endif 755 undefined_init(); 756 757 /* Load memory into UVM. */ 758 #ifdef VERBOSE_INIT_ARM 759 printf("page "); 760 #endif 761 uvm_md_init(); 762 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 763 atop(physical_freestart), atop(physical_freeend), 764 VM_FREELIST_DEFAULT); 765 766 /* Boot strap pmap telling it where the kernel page table is */ 767 #ifdef VERBOSE_INIT_ARM 768 printf("pmap "); 769 #endif 770 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 771 772 /* Setup the IRQ system */ 773 #ifdef VERBOSE_INIT_ARM 774 printf("irq "); 775 #endif 776 becc_intr_init(); 777 #ifdef VERBOSE_INIT_ARM 778 printf("done.\n"); 779 #endif 780 781 #ifdef DDB 782 db_machine_init(); 783 if (boothowto & RB_KDB) 784 Debugger(); 785 #endif 786 787 /* We return the new stack pointer address */ 788 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 789 } 790 791 void 792 consinit(void) 793 { 794 static const bus_addr_t comcnaddrs[] = { 795 BRH_UART1_BASE, /* com0 */ 796 BRH_UART2_BASE, /* com1 */ 797 }; 798 static int consinit_called; 799 800 if (consinit_called != 0) 801 return; 802 803 consinit_called = 1; 804 805 /* 806 * brh_start() has mapped the console devices for us per 807 * the devmap, so register it now so drivers can map the 808 * console device. 809 */ 810 pmap_devmap_register(brh_devmap); 811 812 #if NCOM > 0 813 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 814 BECC_PERIPH_CLOCK, COM_TYPE_NORMAL, comcnmode)) 815 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 816 #else 817 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 818 #endif 819 } 820
Indexes created Tue Oct 14 01:09:49 GMT 2025